The figure below is a piece of wood that has been cut from a cylinder.The diameter of the semi circle is 1.2 cm and the length of the wood is 350 cm.Find the Surface area of the wood.

                                                   

A: 420 cm²

B: 1084.54 cm²

C: 660 cm²

D: 1081.13 cm²

Correct Answer : B

Surface area of the wood=area of triangle+area of two semi circles+Area of curved surface

Surface area of the wood=L×W+2(1/2×π×r²)+πdh

=(350×1.2)×2(1/2×22/7×0.6²)+22/7×1.2×350

=420+1.131+660

=1081.13 cm²

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